How to join two fields in different sql (postgres) tables?

Question

PostgreSQL

Good day! tell me where to look what to do, I need to connect 2 fields example users -> user_avatar (TEXT) I connect with clients-> user_avatar (TEXT) it is necessary that when I change the avatar in users -> user_avatar url changes and in the table clients-> user_avatar I
use postgresql and Navicat

Answer 1

Triggers?!